Men det startar inte.
I Ubuntu funkar det fint.
Är det pga Xfce? eller har jag snubblat på annat?

http://wallpapoz.akbarhome.com/index.html
Wallpapoz application enables you to configure Gnome desktop wallpapers in unique way. You could have Gnome desktop wallpaper changes when the specified time has passed. The most important feature is you could have Gnome desktop wallpaper changes when you change workspace.